I mentioned this on the Steam forum, but it's so important, I thought I'd mention it here too!

Adding Ogre to your Steam Wishlist is a really big deal for us, as it does the following;

a) It gives us a HUGE ego trip ;)
b) It ensures you'll receive a message from Steam when we launch when the game becomes available, so you'll be among the first to play the full game.
c) For various other reasons it shows Steam that there's interest in Ogre, which is always a good thing.
d) It shows that you're interested in Ogre too, and that really helps us plan for the long-term.

So if you've not added the game to your Steam Wishlist yet, just head to the game page and click Wishlist.